Why are you putting a 70 series tire on the front? and not a 60 like the rear. 70 series has a taller side wall and it may cause tire rub on the wheel opening when turning.
The small bolt Cragars from Summit gives you only one choice for the front in 6" and two different back space choices for the rear in 7", one will probably be a bit deeper dish then the other. Summit should be able to verify the correct one for your application, or maybe both will work then its a matter of preference, I personally like a contras between the front & rear rims and usually go with the deeper dish. Sorry, if I had my car here I could measure and be more help.